# @Time  : 2021/7/25 15:10
# @Author: zhanfengzhen
# @Email : zhanfengzhen@126.com
# @File  : calculator.py
# !/usr/bin/env python
# -*- coding: UTF-8 -*-
class Calculator:
    def add(self, a, b):
        return a + b

    def sub(self, a, b):
        return a - b

    def mul(self, a, b):
        return a * b

    def div(self, a, b):
        return a / b